1月14日（火）13:30～15:00 太陽系小天体セミナー 南棟２階会議室
Jan 14 Tue Solar System Minor Body Seminar Conference Room, South Bldg.2F
1月14日（火）14:00～ ALMA-J セミナー アルマ棟 1階 102
Jan 14 Tue ALMA-J Seminar ALMA building Room 102
1月15日（水）10:30 -12:00 総研大コロキウム 講義室
Jan 15 Wed SOKENDAI colloquium Lecture Room
1月17日（金）16:00～17:00 談話会 すばる棟大セミナー室
Jan 17 Fri NAOJ Seminar Large Seminar Room, Subaru Bldg.
詳細は以下をご覧下さい。
1月14日（火）
- キャンパス
- 三鷹
- セミナー名
- 太陽系小天体セミナー
- 定例・臨時の別
- 定例
- 日時
- 1月14日（火曜日）13時30分～15時
- 場所
- 南棟２階会議室
- 連絡先
- 名前：渡部潤一
- 備考
- テレビ会議またはスカイプによる参加も可
1月14日（火）
- Campus
- Mitaka
- Seminar
- ALMA-J Seminar
- Regularly Scheduled/Sporadic
- Sporadic
- Date and time
- Jan 14, 2pm
- Place
- ALMA building Room 102
- Speaker
- Chat Hull
- Affiliation
- NAOJ
- Title
- Star formation, polarization, and magnetic fields in the ALMA era
- Abstract
- New ALMA polarization observations continue to both expand and confound our understanding of the role played by the magnetic field in low-mass star formation. The sample of very young, Class 0 protostellar sources observed with high resolution and high sensitivity with ALMA is now large enough that we are beginning to see the same surprising features in multiple sources. The first of these are magnetic field morphologies that beautifully trace the outflow cavity walls in several objects, suggesting that the outflow has shaped the magnetic field. The polarization along the cavities is strongly enhanced, and in some cases is co-located with emission from UV-tracing molecules, suggesting that the origin of the enhanced polarization is the strong irradiation of the outflow cavities. The second, more puzzling set of features are thin structures with well organized magnetic fields that are not associated with outflow cavity walls, and yet have high polarization fractions in spite of being deeply embedded and far from any obvious source of the photons necessary to align the grains. I will close by discussing recent ALMA observations of polarization toward much more evolved, Class II protoplanetary disks. In the case of my work on IM Lup (one of these disks): consistent with some (but not all!) polarization observations of other disks, the polarization at Bands 6 and 7 (1.3 mm and 850 microns) appears to be due to scattering by dust grains, thus complicating the search for magnetic fields in these sources. While on one hand all of these results challenge our understanding of both magnetic grain-alignment and grain growth, they also have the potential to open up new windows into the dust-grain properties and radiation environments in young star-forming sources.
- Facilitator
- -Name：Yu-Ting Wu
- Comment
- the talk will be given in English
1月15日（水）
- Campus
- Mitaka
- Seminar
- SOKENDAI colloquium
- Regularly Scheduled/Sporadic
- Regular
- Date and time
- January 15th, 2020, 10:30-12:00
- Place
- Lecture Room
- Speaker
- Yuzhu Cui
- Affiliation
- SOKENDAI 5th year (D3) (Supervisor: Mareki Honma, Kazuhiro Hada, Hiroshi Nagai)
- Title
- Variation of M87 jet base revealed by EAVN 2017-2019 campaign.
- Speaker
- Yongming Liang
- Affiliation
- SOKENDAI 3rd year (D1) (Supervisor: Nobunari Kashikawa,Masayuki Tanaka, Yuichi Matsuda, Yutaka Komiyama)
- Title
- Correlation between galaxies and IGM neutral hydrogen at z~2.2 mapped by Subaru/HSC
- Facilitator
- -Name： Kei Ito
- Campus
- Mitaka
- Seminar
- NAOJ seminar
- Regularly Scheduled/Sporadic
- Scheduled
- Date and time
- Friday, Jan 17 16:00-17:00
- Place
- Large Seminar Room
- Speaker
- Eiichi Egami
- Affiliation
- Member of the JWST/NIRCam Instrument & Science team, Steward Observatory, University of Arizona
- Title
- The James Webb Space Telescope (JWST), scheduled for launch in 2021, is NASA’s next flagship space observatory, succeeding the Hubble Space Telescope (HST) launched ~30 years ago. Equipped with a 6.5-meter primary mirror (segmented) and four sensitive and versatile instruments covering ~1-30 microns (NIRCam, NIRSpec, MIRI, and NIRISS), JWST is expected to revolutionize our understanding of the Universe near and far, from detailed studies of exoplanets to discoveries of first galaxies. JWST is currently undergoing the last series of testing and assembly at the Northrop-Grumman facility in Los Angeles, and will be shipped to the launch site next year (Kourou, French Guiana). In this talk, I will present an overview and the current status of the JWST project, together with a back-stage view of various project activities past and present, such as the ground testing at NASA’s Goddard Space Flight Center (GSFC) and Johnson Space Center (JSC) as well as the commissioning rehearsals at the Space Telescope Science Institute (STScI). On the science side, this talk will try to cover a large variety of topics targeted by JWST, with a special emphasis on one large (~800 hours) extragalactic GTO program, the JWST Advanced Deep Extragalactic Survey (JADES). Finally, I will describe some key issues related to the JWST Cycle-1 proposal preparation and evaluation, with the hope of motivating interested researchers in Japan to take advantage of this once-in-a-lifetime opportunity.
- Facilitator
- -Name：Nakaya, Hidehiko